Comparison

Chronometer and Countdown HD vs EyeSound Vocal

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Chronometer and Countdown HD

This utility app transforms your iPad into a versatile multi-stopwatch and multi-countdown timer. It's ideal for timing sporting events, athletic training, or motor racing, allowing simultaneous use of multiple timers and lap measurements.

Highlights
  • 4 independent stopwatches
  • Lap timing for up to 8 events
  • 4 independent countdown timers
  • Adjustable countdown times
  • Synchronization buttons
  • Background operation
Features
Read full description

"Chronometer and Countdown HD" turns your iPad into a multi-stopwatch / multi-countdown timer. Useful in sporting competitions or during athletic training to measure athletic performance, in motor racing and wherever it is necessary to use one or more stopwatches / countdown (simultaneously). Features: - 4 independent chronometer (You can use them simultaneously together with the 4 countdowns) - Interruption and resumption of the stopwatches counting (independently one from another) - "Lap" for measuring the arrival of two subsequent events for each chronometer (total of 8 events simultaneously) - 4 countdown (independent and simultaneously) with remaining time adjustable (using the numeric keypad of the device) - synchronization buttons for all stopwatches and for all countdowns - chronometers and countdowns active even when the application is in the background

About

EyeSound Vocal

Features
Read full description

EyeSound Vocal converts spoken words and other sounds into data rich images. These are seen in an active spectrogram displayed on the screen of your device. Latency of sound-to-image is less than 100 milliseconds. The spectrogram can be tuned by the user so that images of most spoken words are recognizable and are unique. If one has memorized a good sized vocabulary of word images, there can be some visual comprehension of spoken conversations just from viewing the app's spectrogram. Details in the spectrograms indicate inflection and volume. Applications/uses: - entertainment - watch as sounds and conversations morph into image streams - art - create and download spectrogram images that correspond to spoken phrases or other sounds ------------------------------------------------ NOTE: EyeSound Vocal does not capture medical data and does not provide health related measurements, diagnoses or treatment advice. It is not intended for use as a tool for treatment of medical conditions. It is not intended for use as a tool for scientific measurements. ------------------------------------------------ User adjustable parameters in the app include the rate at which sonogram images progress across the screen, resolution, colors, color switching and color mapping to sound intensity, high frequency boost. Features include auto gain, display of saved images next to active or paused spectrogram, pause/resume for capture of images, save/recall of images, save/recall of setup parameters, default parameter setup that is well suited to the visualization of human speech. full screen mode for a view of nothing but the active, or paused, spectrogram. How the app works: Sound is captured by your device's microphone. The app processes the sound data in small sized packets. For each packet the app computes frequencies and intensities. A spectrogram is created by color mapping intensities across frequency bins and then plotting these versus time. With ongoing plotting of packet data as it arrives the spectrogram becomes 'active' - it appears as a movie. EyeSound - Past, Present, Future: 45 years ago, in 1979, a young chemical engineer fresh out of MIT had just begun working for GE in Niskayuna, NY. In his spare time he built and experimented with breadboarded circuits that incorporated resistors and capacitors, transistors and ICs and lights, microphones and speakers. One day he assembled a device consisting of a row of LEDs tied into a circuit that would sequentially light the LEDs in accordance with an input voltage signal. When he manually swept this device in an arc he saw - very much to his surprise and to his fascination - images of complex waveforms painted across empty air. This simple device was giving a glimpse of all of the information that was normally only heard! The engineer had found a mission: improve upon the device to open to the world a whole new dimension of visual perception. A team of 2 of us - the engineer and the coder - have over the past several months turned the concept into an app. The initial release is happening now. The 45 year old mission is on the verge of realization. We anticipate releasing new versions of the EyeSound Vocal app on a regular basis. Users - please send us your suggestions and we'll use them as direction for improvements and use them to expand on our user tips. We will be taking a look into interfacing EyeSound with two types of peripheral devices (1) AR glasses which could put the active spectrogram front and center in your field of view - so that while viewing the spectrogram you will be more in the same world with the people around you; (2) wearable, directional and better quality microphones to avoid the pick up of background sounds that at times obscure the visualizations.

Screenshots

EyeSound Vocal4 screens

Verdict

The call

The clearest difference is price: EyeSound Vocal at Free against Chronometer and Countdown HD's $0.99. EyeSound Vocal also leads on update cadence (every 3 weeks vs every 42 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

EyeSound Vocal is free to download; Chronometer and Countdown HD costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Chronometer and Countdown HD ships an update every 42 months, EyeSound Vocal every 3 weeks. The most recent releases landed on November 1, 2026 and November 8, 2026 respectively.

Scorecard2 real differences · 8 level
Chronometer and Countdown HD versus EyeSound Vocal: the parameters behind the verdict, then further details
ParameterChronometer and Countdown HDEyeSound Vocal
Price$0.99Free — better
Rating2.0 (1 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 42 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPadiPhone, iPad — better
Requires iOS18.017.0 — better
Further details — not scored
Size3 MB3 MB
Age rating4+4+
DeveloperGianluca Natalinikeith house

In-app purchases

None

Chronometer and Countdown HD

No in-app purchases

None

EyeSound Vocal

No in-app purchases

Questions

Is Chronometer and Countdown HD free?
Chronometer and Countdown HD costs $0.99, with no in-app purchases.
Is EyeSound Vocal free?
EyeSound Vocal is free to download, with no in-app purchases.
Do Chronometer and Countdown HD or EyeSound Vocal have ads?
Neither Chronometer and Countdown HD nor EyeSound Vocal shows ads.
Which is updated more often, Chronometer and Countdown HD or EyeSound Vocal?
Chronometer and Countdown HD ships an update every 42 months, and EyeSound Vocal every 3 weeks. Most recently, Chronometer and Countdown HD was updated on November 1, 2026 and EyeSound Vocal on November 8, 2026.

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